Without genetic variation, a population cannot evolve in response to changing environmental variables and, as a result, may face an increased risk of extinction. For example, if a population is exposed to a new disease, selection will act on genes for resistance to the disease if they exist in the population.
Answer:
Nutrient replenishment
Explanation:
Any living organism has nutrients in their body. So when they die or decompose, a lot of the nutrients break down and goes back into the ground.
Answer:
The difference in the climate is because of the latitude.
Explanation:
The climate of a particular region differs from that of another region because of many reasons. One of the reasons is the difference in the latitude of the regions. The difference is in the amount of solar radiation received by the different regions. In the polar region, the temperature is low and it is cold there. While, in the tropical regions, the temperature is high and therefore it is warm in these regions.
